We are in midst of migration AD user. Due merger between our company and third party, the management decided to migrate the AD user from third party forest domain to our forest. The two trust between forest had been created. We had successfully move AD User (including SIDHistory) from third party domain to our domain. We give example the moved user is Migration01. Previously, on third party domain, Migration01 user able to access their file server on \\contoso\migration Once, we join Migration01 user PC to our domain, Migration01 unable to access \\contoso\migration. Error access is denied. I'm checked that the SIDHistory was copied. Please advice.

What if you use \\contoso.com\migration (I suppose here that contoso.com is the FQDN of your domain). If they are able to access it, make sure that on the client computers, NetBIOS over TCP/IP is enabled. Once done, try to add the contoso.com as a DNS suffix. This Microsoft article should help. Also check that all is okay with the NTFS and share permissions. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration

Hi, Thanks for posting here. You may disable SID filtering with the steps in KB939089 on both domains first : Error message when you try to access shared resources on an Active Directory trusting domain: "Access is denied" http://support.microsoft.com/kb/939089 After that enable Sidhistory on both sides with perform the following commands: Netdom turst <source domain> /domain:target domain /enablesidhistory (will give you the current status ) Netdom turst <source domain> /domain:target domain /enablesidhistory:yes ( enable that) Netdom Syntax http://technet.microsoft.com/en-us/library/cc781853(WS.10).aspx After that please check if this issue persist . Thanks Tiger LiPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

i'm not able to \\contoso.com\migration and \\contoso\migration

Hi Suriya25, Have you tried the method I posted and what’s the result ? Thanks. Tiger LiPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.